Rochester, New York. Purpose is to document the history and thought of the Baptist movement in all of its forms. The Library is believed to hold the largest collection of Baptist related research materials in the world. It holds approximately 80,000 volumes, including over 500 volumes of original church records. More than 400 manuscript collections of Baptist ministers, missionaries, and scholars are kept here.

The Archdiocese of Chicago's Joseph Cardinal Bernardin Archives & Records Center, with more than 8,000 cubic feet of archival materials, constitutes one of the world's largest repositories of Archdiocesan Archives.

Holdings in the Archives of the University of Baltimore. The Archives of Maryland Polonia was founded in 1982 to preserve, document and make available to reseachers the history of Polish immigrants and people of Polish heritage in the State of Maryland.

Centralized copy of sacramental records for the Diocese of Shreveport. The earliest sacramental records of the Shreveport diocese date from the mid to late 1800s. Sacramental records dated before 1925 are considered to be open for research purposes.

The Archives of the Episcopal Church is responsible for the collection, management, and preservation of the records and archives of the national Episcopal Church. The national Church includes the General Convention and the Domestic and Foreign Missionary Society.

Saint Louis, Missouri. Holds the official materials of the former Evangelical Synod of North America and the Evangelical and Reformed Church. Its primary purpose is to catalog and make available records of United Church of Christ congregations, persons, and agencies that belonged to the former Evangelical Synod of North America.

Includes Arkansas Civil War service and Confederate pension files; information about Arkansas soldiers in the Mexican War, the Spanish-American War, and the First World War; and various indexes to service in the American Revolution, the War of 1812, Indian wars, and the U.S. regular army.

Collection of primary source material relating to business and labour. The NBAC holds archives of industrial organisations, businesses, professional associations, industry bodies and the labour movement.